Questions tagged [react-hooks]
React Hooks are a feature that allows developers to use state(s) and other React component lifecycle features without writing a class-based component.
react-hooks
30,903
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Cannot read properties of null (reading 'useContext') TypeError: Cannot read properties of null (reading 'useContext') When using MUI components
I am new to node and ReactJS and I am trying to use MUI components like https://mui.com/material-ui/react-app-bar/ (Using the 3rd example, I am not editing the code at all) but I keep getting
Cannot ...
- 1
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30
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React doesn't renders its child components during batch state updates with child
React renders its child components when the parent renders. But if a render is triggered in both the components by a state change in the same batch then a render in parent component doesn't trigger a ...
- 13
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10
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Managing Multiple WebSocket Connections in React with Shared Connections for Components Using the Same URL
I'm working on a React application where I need to manage multiple WebSocket connections. Specifically, I want different components to be able to share a connection if they use the same URL. I'm using ...
-1
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8
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Fix ERROR: TypeError: Cannot read property 'useContext' of null, js engine: hermes & ERROR: Invariant Violation: "main" has not been registered
I'm using React Native to complete an app. The app was working fine on my android emulator up until I tried to add in react-native-svg and react-native-qrcode-svg from npmjs. After adding I was met ...
- 1
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35
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What is it that useReducer can do that useState can't?
I have a set of product details stored in in Firestore. I've created a custom hook to fetch the product details. The product categories should be displayed in the matching url param. As I add more ...
- 13
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10
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How can I use mutationfn with a reusable API file
import axios from "axios";
const axiosInstance= axios.create({
baseURL:"https://jsonplaceholder.typicode.com"
})
class APIClient<T>{
endpoint:string
constructor(...
- 1
-1
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answers
9
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React useGsap with scrolltrigger not updating actual width of the DOM element
/* eslint-disable @next/next/no-img-element */
"use client";
import { useLayoutEffect, useRef } from "react";
import { useGSAP } from "@gsap/react";
import { ...
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0
answers
9
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Notifee Custom Sound works in foreground, not in background and kill mode in React Native
const queryClient = new QueryClient();
const Root = (props) => {
const { hasNotifPermission, requestNotifPermission } = useNotificationsPermission();
useEffect(() => {
LogBox....
- 1
0
votes
2
answers
74
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useState hook not functioning properly
So I am creating a clone of Google Gemini using React js and I am keeping a useState hook to keep the track of the chat history in the format that gemini API requires (array of objects where each ...
0
votes
1
answer
61
views
Not able to get inside the for loop in React js
I am making a To-Do App. I am using React frontend, Node backend, and Postgresql DB.
I made a component called <TaskLists /> which takes three properties or props:
startDate
endDate
allTasks
...
- 23
0
votes
1
answer
33
views
Cannot update state from child element in React (functional components)
I want to have a child component reference and update a state; however, when I try to do so, it only works once or twice before breaking. Strangely, the parent element can still update the state.
...
-4
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0
answers
21
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Invariant failed: A state mutation was detected between dispatches [closed]
This is the body of the code
const tableHeader = [
{ title: "Product name", widthClass: "w-[25%]" },
{ title: "Product category", widthClass: "w-[19%...
0
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0
answers
28
views
How to make a tooltip for a column in a table if the text in the column is larger than 250 pixels
I am using tailwind and shadcn for development.
My idea is that if the text in a column is larger than a certain number of pixels, it should be possible to see a tooltip from the shadcn library for ...
- 81
0
votes
1
answer
59
views
Change in locale is not affecting the application
I am creating an application with dayjs as the date-time library. In the application I am setting the default locale to "en" at the app level and when I am changing the language in the ...
- 171
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2
answers
39
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Working of useSearchDebounce custom react hook
I found this code from this answer https://stackoverflow.com/a/68780417/26420821
How does it work?
export function useSearchDebounce(delay = 350) {
const [search, setSearch] = useState(null);
...
- 1
0
votes
1
answer
21
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useState returning empty array on default state, using react + supabase
I need help to understand why when I console.log(menus) on Menu.jsx it returns an array of values, but if I console.log(item) it only returns an empty array, while the default value of the item is &...
- 55
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votes
1
answer
62
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onClick method not working in my React Project [closed]
I am creating a react eCommerce project everything is done but I'm having troubles in login page I created an account in firebase and configured it to allow user to login via their google account.
For ...
0
votes
1
answer
22
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Keep scroll bar Y position after re-render in react
I tried all other similar questions here but there were about 3 years ago questions and answers which's not working right now.
So I have a child component which contains table and in the parent ...
0
votes
3
answers
57
views
Multi-line Truncated Text with "..." in the end
I need help with Multi-line Truncated Text. I can't cut the final word with "..." in text block with randon string number
So this is my solution which cut the end of my block, but without &...
- 5
-1
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0
answers
21
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Redux State Does Not Change When Modified From useInterval
so im trying to load user data from localStorage and set it to the redux user state. heres what i have done:
Where The User Is Being Used:
import Fruit from "../components/Fruit"
import { ...
- 13
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0
answers
19
views
Does useFormState/useActionState React hook handle multiple requests gracefully like TanStack react-query?
TanStack react-query does a good job handling scenarios where the same request is made multiple times before getting a response.
Does React's useActionState (originally called useFormState) hook ...
- 649
1
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16
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Cant put tsparticle.js component on each carousel slide of React.js
I am using the tsparticle.js with React and Tailwind css for design in my code in the carousel slides but i cant see that on each slide. It appears only on first slide. The rest of the slides are ...
- 29
-4
votes
1
answer
45
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I want to prevent my React app from Security Vulnerability [closed]
I am getting 7 security vulnerabilities (4 High and 3 Moderate). I didn't find any solution to fix those.
I am getting those vulnerabilities with Checkmarx Application Security Testing Tool. Below are ...
0
votes
1
answer
33
views
Unable to pass prop to api function from UseEffect in React Next.js
Just for full context, I am using App Router in next.js.
I am having trouble passing 'serial_num' as an argument to my api function "fetchImages" when I am trying to trigger it from inside ...
- 291
0
votes
0
answers
25
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Why context variables do not update automatically in other contexts/components? [closed]
My problem in short: I use 2 contexts, the first one consumes an array from the second. It looks like when the second updates this array, the first context still holds the old state...
Long version:
...
- 37
0
votes
1
answer
30
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For loop in react using cards
I'm working on recipe project . I have fetch the all data from an API like image ,video ,ingredients into the react cards.
Now i want to the Ingredients for each card as per need . For example card1 ...
0
votes
1
answer
49
views
Default Values vs. undefined in React TypeScript Context
In React with TypeScript, should we define default values for context, or should we allow the context value to be undefined?
Which is generally recommended for better type safety, performance, ...
- 11
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votes
2
answers
32
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The state is not updating correctly inside setInterval of useEffect in react
I'm facing issue in updating the setStartTime inside setInterval function.
I want to update the startTime every minute. To update that, I've created a useRef and storing the value in timeRef.current. ...
-2
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0
answers
29
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invalid hook call. Hooks can only be called inside of the body of a function component. this of the fowwing reason
Invalid hook call. Hooks can only be called inside of the body of a function component. This could happen for one of the following reasons:
1. You might have mismatching versions of React and the ...
0
votes
1
answer
35
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React Form Input Value Does Not Update Passed One Value onChange
I have a very basic react page to update a data structure: list and send the update to a database. Some context for the snippet below: a list is just a basic structure that contains 2 values and an ...
